Objective lenses come in different magnifications, typically ranging from 4x to 100x. For _histological_ samples, start with a lower magnification (e.g., 4x or 10x) to locate the area of interest. Once located, switch to higher magnifications (e.g., 40x or 100x) for detailed examination. Ensure that the _immersion oil_ is used with oil-immersion lenses (usually 100x) to enhance resolution.
